Sound box for talking machines



April 22 1924.- 1,491,723 K. NALBANTIAN f SOUND BOX FOR TALKING MACHINESFiled oct. v. '1992 Patented pr. 22, 1924.

UNITED STATES,

' SOUND BOX FOR TALKING vlVIACPIIlIiI'ES.`

f Applicationv filed October 7, 1922. Seriallo. 593,088.

To all whom it may concern.

Be it known that I, KARAKIN NALBANTIAN, a citizen of Armenia, and aresident of the city of New York, borough of the Bronx, in the county ofBronx and State of New York, have invented a new and Improved Sound Boxfor Talking Machines, of which the following is a full, clear, and exactdescription.

This invention relates to sound boxes for talking machines and has foran object to provide an improved construction which may be readily usedwith either zigzag or hill-and-dale records.

The object of the invention is to provide an improved construction orsound box ada ted to be used with the usual talking mac ine tone arm andadapt the tone arm to operate properly in association with eitherhill-and-dale or zigzag grooved records.

Another object is to provide a sound box in which the parts are soarranged that they may be readily removed but when in use are firmlyclamped together.

In the accompanying drawings- Figure 1 is a side view of a sound boxembodying the invention, the same being shown in connection with part ofthe tone arm of a talking machine.

Figure 2 is a view of the sound box shown in Figure 1 approximately online 2 2.

Figure 3 is a sectional view through Figure 2 approximately on line 3 3,the 'same being on an enlarged scale.

Figure 4 is a sectional view through Figure 2 approximately on line4--4, the same being on an enlarged scale.

Referring to the accompanying drawing by numerals, 1 indicates the gooseneck of a talking machine and forming part of the tone arm structure,said goose neck not forming any part of the present invention but usedin connection with the sound box 2, which sound box is connected withthe goose neck in any desired manner, as for instance, by friction. Thesound box 2 is. provided with a body 3 merging into a tubular flange 4and into an annular flange 5 whereby a casing is provided. The flange 5is internally threaded so as to readily receive the externally threadedwasher or ring 6. A pair of cushioning rings 7 and 8 are arranged in thecasing and on opposite sides of the diaphragm 9 which is preferably ofsheet metal and which is provided with an aperture 10 for receiving theoffset and preferably somewhat enlarged portion 11 of the projectingbase 12 forming part of the stylus post 13. The post 13 is provided witha bore 14 and a clamping screw 15 whereby the needle may be rigidlysecured in the post in a proper operative position.

It will be noted that by reason of the base 12, the oiset portion 11 isarranged centrally of the diaphragm k9 while the post 13 is otl'set fromthe center. Preferably, the enlargement 11 is merely iitted into theaperture 10 in such a manner as to produce a snug fit and is held inplace by reason of the flat spring 16 which has a section 17 pressingagainst the base 12 while the ends of the spring are engaging the ring6. It will be noted that the diaphragm 9 is resilient and also that thespring 16 is resilient whereby whenever the stylus is operated thediaphragm will be vibrated for producing the desired sound. By osettingthe post 13 as setforth, the sound box may be used-y either with ahilland-dale or zigzag groovcd record.

What I claim is 1. A sound box for talking machines, comprising acasing, a diaphragm arranged in the casing, a substantially Z-shapedstylus post engaging the diaphragm and positioned with the center of theZ engaging flatwise said diaphragm, one leg projecting through thecenter of the diaphragm and the other leg projecting at right anglesthereto, and a spring for holding the post in engagement with thediaphragm.

2. A sound box for talking machines, comprising a casing, a diaphragmarranged in the casing, a stylus post formed with a projection extendingthrough the center of the diaphragm, and a body projecting laterallyfrom said center, said body at the end opposite said projection having astylus receiving opening and a spring engaging said body and pressingvthe same tightly against said diaphragm.

3. A sound box for talking machines, comprising a casing, a diaphragmarranged in the casing, said diaphragm having `an aperture in thecenter, a stylus post engaging the diaphragm, said post having a stylusreceiving opening offset from the center of the diaphragm, said postvhaving a projecting base formed with an extension fitting into saidaperture, and a spring engaging part of the casing and pressing againstsaid extension for holding the same against said diaphragm.

4. A sound box for talking` machines, comprising a casing, a diaphragmarranged in the casing and providedfwith a centrally positionedaperture, a stylus post formed with a base adapted tobe engaged flatwiseagainst the diaphragm, said base having a projection extending at rightangles to the surface thereof and fitted into the aperture in thediaphragm, and a fiat spring engaging part of the casing and said baseand acting to hold the base against the diaphragm and the projection insaid aperture.

KARAKIN NALBANTIAN.

